Traction-truck.



Patented May 13, 1902-.

A tlorney 1N VEN TOR I \\5 ml A. KILBY;

- TRACTION TRUCK;

(Applicatian flied Jan. 25, 1902.)

(No Model.)

I I VITZ K'Q'SSZWM UNITED STATES PATENT OFFICE.

ALFRED KILBY, OF DENNYSVILLE, MAINE.

.TRACTlON-TRUCK.

SPECIFICATION forming part Of Letters Patent NO. 699,877, dated May 13, 1902.

Application filed January 25,1902. Serial No. 91,246. (No model.)

To all whom it may concern:

Be it known that I, ALFRED KILBY, a resident of Dennysville, in the county of lVashington and State of Maine, have invented cer tain new and useful Improvements in Traction-Trucks; and I do hereby declare the following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improved traction-truck, and more particularly to improved traction mechanism to take the place of the ordinary wagon-wheel, but of course may be used for various other purposes, the object of the invention being to provide an improved endless track of wide bearing to prevent sinking into soft ground and so construct and mount the same as to insure practically a continuous smooth bearing or track on all component parts of which (that are at one time on the ground) a series of rollers bear, thus insuring a rigid track, preventing vibration and jar.

\Vith this object in view the invention consists in certain novel features of construction and combinations and arrangements of parts, as will be more fully hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in elevation, illustrating my improvements. Fig. 2 is a view in section, and Fig. 3 is an enlarged detail view of a section of the track.

1 1 represent parallel bars spaced the proper distance apart and connected by a series of journals 2, (four being shown,) secured at their ends in the bars and having rollers or pulleys 3 mounted thereon. These rollers 3 are of sufficient diameter to bring their peripheries close together to provide, as far as possible, a continuous bearing of the rollers on the several sections of track 4, (which at one time are on the ground,) or, in other words, to have the weight of the vehicle equally dis tributed throughout all of the track-sections on the ground. These rollers 23 are made with grooved peripheries and may be composed of any desired metal, wood, or com position and may bersolid, as shown, or be skeleton wheels, if preferred. Around these rollers 3 my improved continuous or endless track 4 is mounted, and consists of a series of laterally-elongated strips 5 to give a wide bearing on the ground and prevent sinking into soft earth, and each strip 5 is provided centrally with a tongue or flange (l, bifurcated at its ends to receive links 7, pivotally secured at their ends between bifurcated ends of the tongues on adjacent strips by pins or rivets 8, as shown, and these tongues and links are so shaped as to form a continuous smooth track on which the rollers run, and it will be seen that owing to the close proximity of the rollers to each other and the shape of the tongues and links that practically every strip of the track is continuously borne upon while on the ground, thus greatly relieving shock and jar and facilitating the smooth running of the vehicle. The respective edges of the strips 5 on their bearing-faces are beveled, as shown, to prevent the'accumulation of mud and earth thereon.

A great many slight changes might be resorted to in the general form and arrangement of the several parts described without departing from my invention, and hence I would have it understood that I do not Wish to limit myself to the precise details set forth, but consider myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a traction truck, the combination with a series of grooved rollers mounted to revolve in close proximity to each other, of an endless track on said rollers consisting of a series of strips having tongues at their centers, links connecting said tongues, and said tongues and links so shaped as to form a continuous smooth bearing for the grooved peripheries of the rollers.

2. In a traction truck, the combination with a series of grooved rollers mounted to revolve between parallel bars, of an endless track consisting of a series of beveled strips,

contra-1 tongues on the strips bifurcated at specification in the presence of two subscribeach end, links pivotally connecting the ing Witnesses. tongues on adjacent strips, and the outer or T upper edges of said links and tongues in aline- ALFRED KILB1 ment forming a smooth track on which the \Vitnesses: grooved rollers run. CHAS. I. MORTON,

In testimony whereof I have signed this GEO. H. HAYES. 

